I'm currently shopping for vintage Stetson OR in 7 1/2, preferably LO. Some listings on Ebay describe older Stetsons as "wool" or "wool felt." I thought wool felt was a recent development for Stetson's cheaper lines and would be inconsistent with a 3X or higher designation. Also, how mcuh does the absence of a liner detract from the value of a vintage hat? Any informtion or advice appreciated. Thanks.